HR: 0800h
AN: A11B-0380    [Abstracts]
TI: Dusty Cloud Properties Determined from Surface and Satellite Observations over Asia during PACDEX
AU: * Huang, J
EM: hjp@lzu.edu.cn
AF: College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China
AU: Minnis, P
EM: patrick.minnis-1@nasa.gov
AF: NASA Langley Research Center, MS 420, Hampton, VA 23681, United States
AU: Fu, Q
EM: qfu@atmos.washington.edu
AF: Department of Atmospheric Science, University of Washington, Seattle, WA 98195, United States
AU: Zhao, Q
EM: zhaoqy_gs@126.com
AF: Gansu Meteorological Bureau, CMA, Lanzhou, 730000, China
AU: Su, J
EM: suj2005@st.lzu.edu.cn
AF: College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China
AU: Tang, Q
AF: College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China
AU: Wang, W
AF: College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China
AU: Zhang, W
EM: wzhang@lzu.edu.cn
AF: College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China
AB: In this study, the optical and radiative properties of dusty clouds (clouds formed in dusty air) over Asia are analyzed using A-Train satellite radiances and surface measurements during the Pacific Dust Experiment (PACDEX). The dusty clouds are identified by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite and surface lidar measurements. Significant differences are found in the cloud optical depth, effective particle size, liquid water path and radiative forcing between the dusty and dust-free clouds. The water paths of dusty clouds are considerably smaller than those of dust-free clouds due to the semi-direct effect of dust aerosol. The net radiative forcing at the top of atmosphere (TOA) for dusty clouds is reduced compared to that for dust-free clouds. The reduced cooling effects may lead to a net warming. The semi-direct effect may be dominated by the interaction between dust aerosols and clouds over arid and semi-arid areas and partly contribute to reduced precipitation.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0321 Cloud/radiation interaction
DE: 3310 Clouds and cloud feedbacks
DE: 3311 Clouds and aerosols
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting